VirtualBox is a virtualization product that can run virtualized x86 or AMD64 environments. Run an operating system inside of an operating system.

With VirtualBox, one can run software designed for specific operating systems within a different one, such as running Linux software on Windows. This can be done concurrently without the need for rebooting. VirtualBox is also very useful in the enterprise environment, where infrastructure consolidation is done. Many systems can be ran at once on a single powerful computer system, leading to greater efficiency.

VirtualBox is an actively developed open source project with frequent releases and has an ever growing list of features and continued support.